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The best snorkeling in the Gulf of Thailand is waiting for you at Koh Tao and Koh Nangyuan, two incredibly beautiful islands. Discover the beautiful coral reef at Mango, Tian Nok, Hin Wong, and Sairee bays. Have a real Thai lunch at Nangyuan Restaurant before exploring Koh Nangyuan – itself a dive centre – and walk up to the world-famous viewpoint.